export const singer=state=>state.singer
export const recommend=state=>state.recommend
export const screen=state=>state.screen
export const playList=state=> state.playList
export const currentIndex = state => state.currentIndex;
export const playing = state => state.playing;
export const sequenceList = state => state.sequenceList;
export const playMode = state => state.playMode;
export const currentSong = (state) => {
    return state.playList[state.currentIndex]||{};  //从playList中获取当前需要播放的歌曲mId
};
export const disc = state => state.disc;
export const topList = state => state.topList;